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Finding the Fourth Proportional to 286,006.60, 394,689.17 and 158,681.89

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Solution

The fourth proportional to 286,006.60, 394,689.17 and 158,681.89 is: 218,981.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,006.60 : 394,689.17 = 158,681.89 : x
  2. Step 2: Convert to fraction form
    286,006.60/394,689.17 = 158,681.89/x
  3. Step 3: Cross multiply
    286,006.60x = 394,689.17 × 158,681.89
  4. Step 4: Simplify right side
    286,006.60x = 62,630,023,458.13
  5. Step 5: Solve for x
    x = 62,630,023,458.13/286,006.60
  6. Step 6: Final answer
    x = 218,981.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.